(19)
(11) EP 1 832 820 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
26.09.2007 Bulletin 2007/39

(43) Date of publication A2:
12.09.2007 Bulletin 2007/37

(21) Application number: 07012492.0

(22) Date of filing: 24.07.2001
(51) International Patent Classification (IPC): 
F25B 1/00(2006.01)
 F25B 13/00(2006.01)
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

(30) Priority: 26.07.2000 JP 2000225427

(62) Application number of the earlier application in accordance with Art. 76 EPC:
01950048.7 / 1304532

(71) Applicant: DAIKIN INDUSTRIES, LTD.
Osaka-shi, Osaka 530-8323 (JP)

(72) Inventors:
  • Kataoka, Hidehiko
    Kusatsu-shi Shiga 525-0044 (JP)
  • Nishiura, Yoshihiro
    Kusatsu-shi Shiga 525-0044 (JP)
  • Sakamoto, Shinichi
    Kusatsu-shi Shiga 525-0044 (JP)

(74) Representative: HOFFMANN EITLE 
Patent- und Rechtsanwälte Arabellastrasse 4
81925 München
81925 München (DE)

   


(54) Air conditioner


(57) An air conditioner comprising a refrigerant circuit formed of an outdoor unit refrigerant circuit including at least a compressor (101), a four-way valve (102) and an outdoor heat exchanger (103) arranged in an outdoor unit (100), and an indoor heat exchanger (201) arranged in an indoor unit (200) and connected to said outdoor unit refrigerant circuit by a liquid-side pipe and a gas-side pipe, wherein a bypass circuit forming a bypass between said liquid-side and gas-side pipes (131,132) is provided with a receiver (121) for collecting liquid refrigerant, and refrigerant on-off means (128,129) arranged in a liquid pipe connection pipe (122) connecting said receiver (121) to said liquid-side pipe (131) and in a gas pipe connecting pipe (123) connecting said receiver (121) to said gas-side pipe (132), said refrigerant on-off means (128,129) is controlled based on determination of presence/absence of surplus refrigerant performed by determining a current heat exchanging performance of said outdoor heat exchanger (103), and thereby an amount of the refrigerant in said receiver (121) is controlled.







Search report